Title :
A nonlinear filtering approach to carrier tracking and symbol detection in digital phase modulation
Author :
Leitão, José M N ; Nunes, Fernando D.
Author_Institution :
Dept. de Engenharia Electrotecnica e de Computadores, Centro de Analise e Processamento de Sinais, Lisbon, Portugal
Abstract :
This paper considers the application of nonlinear filtering to carrier estimation and symbol detection in additive white Gaussian noise. Digital phase information is formulated as a sequence of transients of a deterministic dynamical system whose state is randomly initialized at the beginning of each symbol interval, according to an encoding scheme. Random carrier phase is modeled as the first component of a vector Markov process. Symbol-by-symbol detection and phase tracking within symbol intervals are performed by a bank of matched stochastic nonlinear phase estimators. The receiver is a parallel open-loop structure suited to all-digital modems
Keywords :
Gaussian noise; Markov processes; continuous phase modulation; digital phase locked loops; encoding; modems; nonlinear filters; phase estimation; stochastic processes; tracking; white noise; additive white Gaussian noise; all-digital modems; carrier estimation; carrier tracking; deterministic dynamical system; digital phase information; digital phase modulation; encoding scheme; matched stochastic nonlinear phase estimators; nonlinear filtering approach; parallel open-loop structure; phase tracking; random carrier phase; receiver; symbol detection; symbol interval; symbol-by-symbol detection; transients; vector Markov process; Additive white noise; Digital filters; Filtering; Gaussian noise; Modems; Phase detection; Phase estimation; Phase modulation; Probability density function; Stochastic processes;
Conference_Titel :
Communications, 1994. ICC '94, SUPERCOMM/ICC '94, Conference Record, 'Serving Humanity Through Communications.' IEEE International Conference on
Conference_Location :
New Orleans, LA
Print_ISBN :
0-7803-1825-0
DOI :
10.1109/ICC.1994.368986